Machine for making folded paper cups.



S. J. C. LUTTROPP.

MACHINE FOR MAKINGIFOLDED PAPER CUPS.

APPLICATION TILED MAR. 18,1912. 1,056,564. Patented Mar. 18, 1913.

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S. J. C. LUTTROPP.

MACHINE FOR MAKING FOLDED PAPER CUPS.

APPLICATION FILED HARJB, 1912. 1,056,564.

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Patented Mar. 18, 1913.

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S. J. G. LUTTROPP. moms FOR MAKING FOLDED PAPER ours. APPLICATION FILED MAR, 18, 1912.

1,056,564. Patented Mar. 18, 1913.

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MACHINE FOR MAKING FOLDED PAPER CUPS.

APPLICATION FILED MAB..1B7.1912,

1,056,564. Patented Mar. 18,1913.

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MACHINE FOR MAKING FOLDED PAPER CUPS.

APPLICATION FILED MAR.18,1912. 1,056,564, Patented Mar. 18, 1913.

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S. J. O. LUTTROPP.

MACHINE FOR MAKING FOLDED PAPER CU S.

APPLIGATIGN TILED MAR.18. 1912.

1,056,564. Patented Mar. 18, 1913 8 SHEBTSSHEET 6- 'ZGzZ messes slivvenszo 7:

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MACHINE FOR MAKING FOLDED PAPER CUPS.

APPLICATION FILED MAR.18, 1912.

1,056,564; Patented Mar. 18, 1913.

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MACHINE FOR MAKING FOLDED PAPER CUPS. 4

APELIOATION FILED MAR.1B, 1912. 1,056,564. Patented Mar. 18,1913.

UNITED STATES PATENT OFFICE.

SVEN J. CONRAD LUTTROPP, OF ATTLEBORO, MASSACHUSETTS, ASSIGNOR TO CARTER, RICE & COMPANY, CORPORATION, OF BOSTON, MASSACHUSETTS'A CORPOEATION OF MASSACHUSETTS.

MACHINE FOR MAKING FOLDED PAPER CUPS.

Specification of Letters Patent.

Patented Mar. 18, 1913.

Application filed March 18, 1912. Serial No. 684,430.

To all 'HJ/UH/b it nmy corner/1,:

Be it known that I, bvns J. (Tommi) Lu'r- 'rnorr, a subject of the King of Sweden. and

residing at Attleboro. in the county of Bristol and State of hlassaehusetts. have invented certain new and useful Improvements in Machines for Making Folded laper tlups, of which the following is a speeitieation.

Sanitary cups for individual use are made in various terms of" paper: some are pressed or molded into the. usual eup shape, and others are t'ol ed to a tlat. torm prior to use, with overlapping portions secured by an adhesive. Si -me objections are. raised to both. The molded or pressed cups are more bulky than the t'lat'v tolded ones.wl ti,le the latter require the use of an adhesive. or else have intertolded portions that require abrupt bends which are liable to eraek and leak.

The object ol the present. invention is to provide a machine that. will rapidly convert tiat watenprtmt' paper, preferably thin and quite flexible. intotlat cups, the articles being made and completed ready for use. purely by foldin an adhesive. and with no portions that require much bending out for use.

To these ends the invention consists in the machine and the parts thereof substantially as hereinafter described and claimed.

()t the accompanying drawings z- Figure l is a side elevation of the machine, a portion being removed. Fig. 2 is a plan view. Fig. 3.3 is a front elevation. Fig. 4 is a (letail plan iew ot' the spider mechanism on a larger scale than Fig. 3. Fig. 5 is a detail elevation looking from the right. of Fig. 4. the shaft being in section. Fig. 6 represents a section on line (3-43 of Fig. 4. Fig. 7 rep-.

resents a section on line 7--7 ot Fig. 4. Fig. 8 represents the same parts as Fig. 7, but shmving the folders elesed. Fig. 9 is a detail. partly in side elevation and partly in section ot' the. mechanism for performing the first. folding operation and for operating the. feed rolls. Fig. 10 is a detail elevation (on a, smaller scale) of the parts of the machine which are emitted from Figs. and 3. said parts comprising a bracket and rolls and table. for the. supply of the paper. Fig. 11 represents a section on line 11-11 of Fig. 2. Fig. 12 is a fragmentary elevation at the mechanism for cutting the web. Fig.

and without. the use of- 13 is a front elevation of the shears for cutting oil one corner of each blank that is severed from the web. Fig. 14 is a detail elevation of the gearing for the feed rolls. Fig. 15 is a detail side elevation of the cam disk which "controls the cutter and shears. Fig. it is a detail elevation partly in section of the stripping mechanism. Fig. 17 is a plan view of the parts shown in Fig. 16. Fig. 18 represents a section on line 1818 of Fig. 17. Fig. 19 represents a blank'which has been cut "from the supply web or strip, and with a corner clipped off, the dotted lines indicating the lines on which said blank is to be folded successively by the ma ehine. Figs. 20, 21. 22, 23 and 24 are views illnstrat ing the results of the successive fold ing operations. the last twofigures showing the tinished cup from opposite sides.

To facilitate an .i'inderstanding of the detailed description. the following brief preliminary description will be given. The paper from a supply roll 34 (Fig. 10), passes over a table 32 and between the feed rolls 3% to the position shown in Fig. 2. A blank is then cut ott' from the supply by the blade 3 Atthe same time a trial'igular pieee is cut oll' from the corner ofthe blank by the clipper 74. The blade 88 then operates to double the blank diagonally and force it downwardly between folding rolls 87 (Fig. 9). The blank which is then folded into the triangular shapeshowh in Fig. 20, is fed into the arms 102 of aspidcr which has an intermittent rotary motion. The spider itself is next given a quarter turn by means of the. Geneva movement gears 116. 117. The next folding operation is while the blank is in horizontal position. The folder arm 118 (Fig; 4) is operated by the cam 121 so as to bring it across the top face. of the folded blank from the dotted line position to the full line position, producing the term shown in Fig. 21. Next the folder is rocked by a. cam to fold the left hand part. of the blank in a similar manner to the tical position, bottom edge up. The two pairs of rotating rolls 141, 142, 143, 144 (Fig. 18) of the stripping mechanism are next brought upwardly and grip the blank and strip it from the spider arms, at the same time creasing it, producing the tin ished form shown in Figs. 23 and 24. Just before the stripping operation, the spider arms 102 are brought together so as to leave the folded blank free to be taken off from the spider arm by the stripping rolls.

The details of the machine will now be explained.

The frame 30 of the machine is provided with an extension or bracket 31 (Figs. 2, 3

and 10) the latter having a table 32 across which the paper is drawn by feed rolls 33 from a supply roll 34, said paper passing under a take-up roll 35 and between smoothing or holding rolls 36 as is common in many machines which operate on paper that is drawnintermittent-ly from a supply roll.

geared together at 39 and one shaft has also a pinion 40 meshing with a gear 41 on a stud shaft 42. The gear 41 has pawls 43 operated by a combined ratchet and pinion 44 on shaft 42, said pinion being in mesh with a rack 45 the lower end of which is pivoted to a lever 46 (Figs. 1 and 9) having a roll 47 engaged by a cam 48 on main shaft 49. A spring 50 imparts return movements to the lever and rack to an extent variably determined by an adjustable stop 51. As the rack reciprocates, it imparts intermittent feed movements to the rolls 33, the feed being regulated by the stop 51 to advance the web or strip until one end corner comes to rest under guide plates 52, 53. (Figs. 1 and 2) carried by a table 54. Said plates 52, 53 serve to steady the blank and retaln it in proper position during the short interval of time between the operation of the knife and the operation of the first folder blade presently described.

'The knife 37 is carried by a bar 55 (Fig. 11) having inclined slots 56 (Fig. 12) through which guide studs 57 project from a fixed transverse bracket 58. An elbow lever 59 is connected by a link 60 to the bar 55 and to its outer end is pivoted the up er end of a vertical rod 61, the lower en of which has a yoke 62 (Fig. 15) which straddles the main shaft 49. The

- yke 62 carries a roll 63 engaging a cam groove 64 in a disk 65 secured to the main shaft. This mechanism imparts the necessary movements to the knife to cut the web of paper at the proper intervals.

To hold the paper that is between the rolls 33 and the knife, during the operation of the latter and for a short time after the out has been made, I provide means comprising a presser foot 66 (Fig. 11) which cotiperates with a fixed plate 67, said foot being carried by a vertically movable transverse bar 68-having slots through which guide studs 69 project from the bracket 58. The weight of the bar 68, which may be supplemented by suitable springs, will cause it to descend. It is provided with hooked pins 70 which extend above knife bar 55 and with upright pins 71 adapted to engage the under side of lugs 72 of bracket 58. WVhen the knife bar descends, the presser foot also descends and holds thepaper, but the knife continues to descend a little farther, this being permitted by the slots in the bars 55 and 68. Although the paper is cut, the presser foot does not release the paper until the knife rises clear of the paper and, in doing so, engages the hooked pins 70 and positively raises the presser foot bar. Said bar is preferably provided with a flanged plate 73 which projects over the paper close to the knife 37 to prevent the cut edge from curling up.

The piece of paper out ofi by the knife 37 is square as indicated by dotted lines in Fig.

2. For reasons explained hereinafter, it is desirable that one corner of the square piece shall be removed so that the blanl to be folded will have substantially they form shown in Fig. 19. To remove the triangular piece I employ a supplemental knife which I shall refer to as the clipper, to distinguish it from the main severing knife. The clip per 74 (Fig. 13) is pivoted at 75 and has an arm 76 connected by a spring 77 to a suitable fixed part of the machine, said clipper cotiperating with a fixed bar 78, to act like shears or scissors. The clipper is mounted to cut at an angle of 45 degrees to the line of cut produced by knife 37, as indicated in Fig. 2. The spring 77 acts to hold the clipper 74 in the position shown in Fig. 13. The clipper is depressed against the action of the spring, by a lever 79, pivotally supported at 80 (Fig. 12) one end of said lever projecting over the clipper, and the other end extending into a yoke 81 adjustably secured to the rod 61 so that as the latter rises to cause the descent of the main knife 37, the yoke will cause the lever 79 to oscillate and throw the clipper down. As the lever so oscillates, it also throws down another lever 82, which, for purposes of definition and not limitation, I shall refer to as the pincer. Said pincer lever is piv- -oted at 83 and is normally held in the position shown in Fig. 13 by a spring 84. When the pincer is forced down, it cooperates with a fixed strip 85 to hold the riangularpiece of paper so that if the Clll). per does not entirely remove the said piece, the pull of the rolls 87 of the first folder presently described will tear what slight portion remains uncut, and carry away the body of the blank Without drawing the tri angular piece also or giving a pull to the supply strip.' The triangular pieces drop into a suitable chute, the receiving end of which is shown at 86 in Fig. 3.

The first fold, to convert the blank from the form shown at. a. in Fig. 19 to the form 1 shown in Fig. 20 is performed by two rolls 1 1"? with which a blade 88 coacts, said blade striking the blank at its diagonal center: and starting the fold and presentii'ig it to l the nip of the rolls in a manner well known i in machines for folding newspapers and; other sheet material. The blade 88 is car- 5 ried by an arm 89 (Figs. 1, 2, and 9) mountl ed on a suitably supported rod 90 and hava ing a short arm M to which is pivoted at $12 l l l l l l l l l l l l l the upper end of a link or bar 93 which has roll 94 engaged by a cam groove 9.7: in a iii-k at? on main shaft 49. The lower end of the bar 2)? is formed or provided ith a yoke straddling the shaft 4!). The rolls 87 are geared together at 97 (Fig. 2) and are driven by a belt or chain 98 from a pulley or sprocket 99 on shaft 4!).

The blanks, as they are successively folded 3 as described to triangular form, are fed down to the arms of an intcrn'iittcntly rotatcd device which, for purposes of dclini-- iion and not limitation is referred to herein as the spider. ()n the way to said arms, from the rolls 87. each blank passes between two pairs of guides 100 (Figs. 25. 5. and fl) and after it leaves the nip of the rolls its inclined upper edges are engaged by two swinging pushcrs 101 and pushcd down into the arms of the spider until its lower fohlcil edge comes to rest against two rolls i or cylindrical stops 103 carried by tllc sha ft i Hit of the spider. The pllshcrs lOl arc se ured to a rock shaft It)? (Figs. 1.3.4 and 5). said shaft having an arm lot; which is actuatrd by a rod It)? provided with a yoke l straddling the main shaft 49 and having a roll 10% (Fig. l) engaged by a cam lo.) on said shaft. The cam actuatcs the rod and rock shaft and pushers in their rcturn direction. the other or. operative direction of l movement being imparted by a spring 110 l connected to said rod and a fixed part of the f 'amc. so that the movement of the pushcis when performing their function will be a yielding one.

it being understood that I do not limit myself to the number of pairs of spider arms 102 shown, I will proceed to describe i the structure illustrated, in which there are l i inner ends of the recesses of the latter.

3 led to the full line position.

eight such arms, in four pairs. Each arm comprises two plates to constitute a jaw and the blank is carried down by the rolls HT and pushcrs 101 between the plates of the two arms standing upright. The two plates of each arm are connected so as to present a narrow space to receive the folded blank, each arm being pivotally mounted at 111 (Figs. 4 and .3) in a radial recess 111 an car 112 carried by shaft ltll, there being four pairs of such recessed cars. The two arms of each pair are caused to normally diverge as shown in Fig. 4. to cause the proper shape of the next folds of the blades to be attained as presently described. by a spring ll?) connecting such two arms. To limit the outward spread or divergence of the arms,

1 they are provided with h els lll which contact with the sides of the cars 11; at the The arms are also provided with outwardly projecting fingers 115. which, at certain times hereinafter described, ride over fixed cams to cause the two arms of each pair to approach each other to permit the folded cup to be remored.

After the triangularly folded blank has been locatcd in the jaws or arms that are in upright position. the spider shaft is given a one-quarter rotation by :1 Geneva movement mechanism comprising the gears llt,

ill. (Figs. l. :2. Cl. 5 and h), the latter being carried by main shaft 4%). lly this movement the blank is carried to and held in horizontal iiosition. for the wing folders to turn or fold over the a ute-angled portions of the doubled blank on lines d lincd by the outer edges of the spider arms 102. .\t this time the blank occupies the position indi catcd by the dotted outline in Fig. 1 which is a plan view. but not yet folded further than shown in Fig. 20. To fold or turn in the corner I. a folder lib. (Fig. l pivoted at li to a lixcd brackct arm and normallyheld outwardly by a spring lit). is acted upon by a cam 12] on shaft 4'1 to swing from the dot This auses the corner I! to be carried over or foldcd (scc Fig. :21) because. \vhcn tbc .-pidcr was mov ing to the position last mentioned, the doubled blank was carried down, with the corncl' part on top of folder arm H8 and slightly past it, so that when the spider came to rest. the orner part I) was dcllcctcd upwardly by the then stationary arm 11h.

llcfore the folder arm 11 reaches the position shown by full lilies in Fig. l, and con sci ncntly bcforc thc part (I turned thereby is released from the hold of said arm. the next folder l2! turns over the other acute angled bortion c (l igs. 2t) and 21) to the position shown in Fig. '22. In Fig. l. the folder 122 is shown by full lines as not having started from its inoperative position, for the sake of clearness in that figure. As a scribed and carried down to lower-inverted matter of fact, the folder 122 moves-from the full line position partly toward the dotted line position before the folder 118 quite reaches its full line position. The folder 122 I is a plate or blade carried by a rock shaft 123 mounted in a suitably supported hearing 124 (Figs. 4, 5, 7 and 8) and having an arm'125 in the path of movement of a cam arm 126 carried by shaft 49. Another arm 127 of the rock shaft is actuated by a spring 128 to hold the folder 122 upright as shown in Fig. 7. this position being determined by a stop 129, until the cam arm 126 causes the rock shaft to move to carry the folder plate 122 over to thc position shown in Fig. 8 and by dotted lines in Fig. 4. This results in the blank being then folded as shown in Fig. in order that the blank will remain so folded while the spider makes the next step or one-ft'iurth rotation, I provide a fia or holder for each pair of spider arms. inch of said/holders comprises a plate 130 (Figs. 4 and 5) carried by l a pair of lugs 131 secured to a ro k shaft 132 mounted at its ends in the ears 112. .lllidlength of the rock shaft is secured a cam 133 against. which a plate spring 134 secured to the hub which carries the cars. so that said spring will hold the plate 130 either toward or away from the plane of the l spider arms 102. Suitably mounted curved stops 135 limit the outward positions of the flaps or holders.

When the folder plate 122 moves as hereinafter described to fold the portion o of the blank on top of the portion 7). a small curved arm 131i, projecting from said plate 122, throws the plate 131) down so that the spring 131 of the latter keeps it in po ition to hold the blank in its folded position while the spider is given another step or one-fourth rotation. Each plate or holder 139 remains in this, its closed position, until the spider arms carrying it. are moving from their left hand horizontal position. (Fig. 5) to the upright position to receive another doubled blank from the first folder olls. Vhen so moving. the outer edge of plate lot) strikes the tip of a fixed arm or opener 137 which holds back said outer edge so that. as the spider continues its movementf the holder 130 is svv ung outwardly and its fiat spring 134 holds it open until again closed by the arm 136 of folders 122.

In Fig. 3, two dotted outlines indicate blanks in position in the spider arms. the upper one showing the doubled blank that has just been pushed down into a pair of spider arms. and the lower one showing the blank that has been, folded as so far doposition and ready to be stripped from the i spider arms and have its two lips spread and folded against opposite sides of the cup to complete it. If the lower, inverted blank i s spider is bringing a blank in the should now be pulled off from the spider arms, the spring 113 being depended upon to yield to permit this to be done, there would be liability of the cups being torn or out while being pulled off. Therefore I prefer to positively collapse the two lower arms 102 to enable the stripper mechanism to remove the folded blank without risk of injury. Extending transversely of the frame of the machine, is a web member 138 (Figs. 1 and 3) having ears 139 provided with cams 140 (Fig. 6) around which the fingers 115 of the spider arms travel. As shown by comparing Figs. 3 and 6, when a pair of spider arms approaches the lower vertical position, their fingers 115 ride over the parts of the cams 140 having the greater radius and cause the arms to approach each other so as to release the folded blank carried thereby.

The mechanism which simultaneously strips the blanks from the spider arms and (Oil'lPlQtQS the folding and does the final creasing will now be described, referring to Figs. 1, 3, 16, 17 and 18. Four rolls, 141, 142, 1 13, 1 14 are provided, each having roughened or knurled end portions 145 slightly larger than the intermediate portions. The shaft of roll 141 is mounted in ears of slides 147 mounted in vertical ways 148 carried by web 138 said slides having ears 146 (Fig. 1G). The rolls 141, 142, 143, 14-4, are connected by two pairs of links 149, and springs 150 connect the links 149 so that the front and rear rolls will be held yieldingly together. To raise and lower the rolls, I provide a lever 151, pivoted at 152 and having a roll 153 engaged by a cam i5 1 on shaft 49, said lever having an extension 155 provided with a weight 156 to cause the roll to follow the contour of the cam. A spring 157 may also be connected to the lever 151. The operative end of the lever 151 is formed as a yoke the ends of which are connected by links 158 to the shaft of the upper roll 143. Said yoke ends also ha vc slotted connections with the ears 146 of slides 147. The four rolls have pulleys engaged by a belt 159 driven by pulley 1.60 on shaft 49, two idlers 1G1, 162 being employed, the latter being carried by an arm 163 of a lever 164 pivoted at 165, whereby the idler 162 serves as a gravity belt tightener that rises and falls with the four str1p ping rolls.

Mounted in the shaft of roll 111 is a separator bar 166 (Figs. 3, 17 and 18) having its ends provided with toes 167 adapted, when the stripping rolls rise, to engage the lower edge of web 138 so that said separator will swing in the direction of the dotted arrow in Fig. 18. In said figure, the view is opposite *to that in Fig. 1. \Vhen the condition of Fig. (but inverted of course) to lower vertical position, it is moving in the direction of arrow .72, Fig. 18. The lip or flap (1, having been truncated by the the small triangular piece as passes over the separator tee while the pointed lip or flap (2 is stopped by the edge of the separator and the roll 14%. set of stripping rolls and the separator rise. but owing to the toes 167 being detained by the lower edge of web 1338, the separator immediately swings and turning it up against one side of the spider arms 1.02. lloll 143 does the same to the other flap 6. lontinuing to rise until the upper rolls reach the dotted positions of Fig. 18, the four rolls, which are being driven by the belt 159 in the proper direction, pull or strip the article from the spider arms. The roughened parts it) of the rolls do this. and at the same time press and crease the final folds, the smooth intermediate parts of the rolls passing the spider arms without 'being spread thereby. As shown by Figs. 23 and 24. the longer or pointed flap (2 ()VEIlits the side of the cup which has several thicknesses. due to the previously folded parts /1 and 1, While the shorter or truncated flap I, overlies the side having a single thickness.

It will now be understood that the machine manufactures cups of the type illustrated. in Fig. 24 from a quadrilateral blank, the first fold being on a diagonal line to form a two-ply triangle. as shown by comparing Figs. 19 and 20. the machine then folding the opposite extremities of the triangle reversely against the sides of the middle portion of the triangle, as shown by comparing Figs. 30. 22 and 25). especially in connection with the hereinbeforc explained uccessive operations of the folders. \Yhen the parts are so folded the portions of the folded extremities which are not connected together, or in other words. the upper ed ges of the triangular extremities. are substarc tially parallel with thenfiddle portion of the first mentioned diagonal fold. whit-f, constitutes the bottom of the cup. Tliv final folding of the flaps (l, c, as shown i Fig. 18, results in turning the angular portions of the blank in opposite directions against the outer faces of the previous y inturned extremities. In other words. the

machine folds a blank up n itself to form triangular-hind sections and trapezoidal in tcrmediate sections. edge portions of said ections being finally folded over the upper portitinSflf the other sections to hold the folds in position to form a cup.

1. A machine ol' the haracter described. comprising a cutter for severing a strip transversely to form a rectangular blank, a folder at an angle to the line of cut to double the blank on a diagonal line. sucremoval of 1 described,

Then th e i dellects the tia p 1/. '1

l i l l l l l l "blank to cessively operated folders to fold the twoacute-angled ends of the doubled blank, and means for spreading the two remaining cor ners of the blank and folding them against opposite sides of the article.

A machine of the character described, comprising a cutter for severing a strip transver elv. a clipper to remove one ccr net of the severed blank, a diagonally mounted t'chler to double the blanks. folders for turning the ends of the doubled blank against the center portion. and means for folding the truncated c rner and the corner that was doubled again t it over againstopposite sides of the article.

it. machine of the character described (titll]i]l lii;1' blank doubling mechanism, means for feeding a strip of paper thereto in a direction substantially at an angleof 45 degrees. a cutter for severing the strip between the feeding and doubling mechanisms, and means for folding the corners of the doubled blank.

4. ln a machine of the character described, blank doubling mechanisms, means for feeding a st rip of paper thereto at an angle, a cutter t'or severing the strip, a clipper for removing a corner of the blank, means for holding the clipped corner to prevent it from following the blankto the doubling mechanism. and means for folding the (orners of the doubled blank.

5. in a. nuichine of the charifiter described, a pair of intermittently rotatable arms. means for doubling a blank and assembling it with said arms when the latter are in one position. means cooperating with said arms when in another position to further told doubled portions of the blank, and means for removing the blank from the arms when the latter are in a. third position.

machine of the character descril'ied, comprising intermittently rotatable arms, m ans f r d ubling a blank on a diagonal line and inserting it in said arms while the latter are upright, folders to turn opposite ends of the doubled blank over while the arms are substantially horizontal, and means for folding the remaining corners of the blank while the arms are in vertical position.

T. A machine of the character described, comprising intermittently rotatable arms, means for doubling a blank on a diagonal line and inserting it in said arms while the latter are upright. means including pushers for positively moving the doubled position relatively to the arms, folders to turn opposite ends of the doubled blank over while the arms are substantially horizontal, and means for folding the remaining corners of the blank while the arms are in inverted position.

8. A machine of the character described, c mprising intermittently rotatable arms,

means for doubling a blank on a diagonal line and inserting it in said arms while the latter are upright, folders to turn 0 osite rnds of the doubled blank over Wlll e the arms are substantially horizontal, a holder movable with the arms to retain the said ends in folded position While the arms move the next step, and means for folding the re maining corners of the blank while the arms are in inverted position.

9. A machine of the character described, comprising intermittently rotatable arms, means for doubling a blank on a diagonal line and inverting it in said arms while the latter are upright, folders to turn opposite ends of the doubled blank over while the arms are substantially horizontal, and means for folding the remaining corners of the blank while the arms are in inverted position, and stripping the folded article from said arms.

10. A machine of the character described, comprising intermittently rotatable arms, means for doubling a blank on a diagonal line and inserting 1t in said arms while the latter are upright, folders to turn opposite ends of the doubled blank over while the arms are substantially horizontal, and means. for foldin the remaining corners of the blank Whig; the arms are in vertical position, and stripping the folded article from said arms, said arms being collalpsible to facilitatethe removal of the artic es therefrom. y

11. In a machine of the character described, a spider having a plurality of pairs of arms, means for intermittently rotating it, means for doubling blanks diagonally and assembling them with the arms while the latter are upright, folders to turn opposite ends of the doubled blanks over while the arms are substantially horizontal, and means for folding the remaining corners while the arms are in inverted position.

12. In a machine of the character described, a spider having a plurality of pairs of arms, means for intermittently rotating i means for doubling blanks diagonally a assembling them with the arms while the latter are upright, folders to turn opposite ends of the doubled blanks over while the arms are substantially horizontal, the arms of each pair being collapsible, and means for simultaneously folding the remaining corners and removing the article while the arms are in inverted position.

13, In a machine of the character described, a spider comprising an intermittently rotatable shaft, a plurality of pairs of arms pivotally supported thereby to swing toward and from each other, stops to limit their outward movement, springs to hold them normally apart, means cooperating with said arms for folding blanks carried thereby, strippers for removing the folded blanks from the arms, and means for automatically swinging the arms of each pair toward each other to facilitate the operation of the strippers.

14. In a machine of the character described, a spider comprising an intermittently rotatable shaft, a plurality of pairs of arms pivotally. supported thereby to swing toward and from each other, stops to limit their outward movement, springs to hold them normally apart, means cooperating with said arms for folding blanks carried thereby, strippers for removing the folded blanks from the arms, and means for automatically swinging the arms of each pair toward each other to facilitate the operation of the strippers, said swinging means comprising fixed cams, the arms having fingers to engage said cams.

15. In a machine of the character described, an intermittently rotatable pair of arms, means for doubling a blank and assembling it with said arms when the latter are in one position, a pair of folders for successively acting on portions of the doubled blank while the arms carrying it are in another position, one of said folders comprising an arm movable in a plane parallel with the plane of the carrier arms and the other folder comprising a plate mounted to rock on an axis parallel with the line of the fold to be made thereby, and means for further folding the blank and removing it when the arms are-in a third position.

16. In a machine of the character described, an intermittentlg rotatable series of carriers, means for dou ing blanks to triangular form and inserting them in said carriers, folders cooperating with said carriers for folding opposite ends of the doubled blanks on lines determined by said carriers to convert the blanks into cups, and strippers for removing the cups from the carriers.

17. In a machine of the character described, an intermittently rotatable series of carriers, each comprising a pair of arms, means for successively supplying a doubled blank to each carrier while in one position, folders for turning over two portions of the doubled blank while in the next position, and means for completing the folding of the article while the carrier is in a thir position and simultaneously removing it from said carrier.

18. In a machine of the character described, an intermittently rotatable series of carriers, each comprising a pair of arms, means for successively supplying a, doubled blank to each carrier while in one position,

folders for turning over two portions of the doubled blank While in the and means for completing the folding of the article while the carrier is in a third osition and simultaneously removing it rom next position,

angle, with the unconnected edges of said said carrier, said means comprising a separator for spreading two flaps or tips of the partially folded article, rolls, means for rotating the rolls, and means for raising and lowering the separator and. rolls.

19. A machine for making cups comprising folders for doubling a quadrilateral blank on a diagonal line to form a two-ply triangle, folders for turning the opposite extremities of said trianglo reversely against the sides of the middle portion of said triangle, and actuating mechanism for said folders.

20. A machine for making cups comprising folders for doubling a quadrilateral blank on a diagonal line to form a two-ply triangle, folders for turning the opposite extremities of said triangle reversely against the sides of the middle portion of said trifolded extremities substantially parallel with the middle portion of the first mentioned diagonal fold, and means for carrying the blank from the first mentioned fold ers to the second mentioned folders.

21. A machine for making cups comprising folders for doubling a quadrilateral blank on a diagonal line to form a two-ply l triangle, folders for turning the opposite extremities of said triangle reversely against the sides of the middle portion of said triangle, with the unconnected edges of said folded extremities substantially parallel with the middle portion of the first men-- tioned diagonal fold, folders for turnin the two plies of the remaining angles 0 ti triangle in opposite directions against tl' outer faces of the previously inturned extremities, and means for carrying the blanks for successive operation by said folders.

22. A machine for making cups comprising folders for doubling a blank upon itself to form triangular end sections and trapezoidal intermediate sections folders for turning edge portions of two of said sections over the upper portions of the other sections to hold the. folds in position to form a cup, and automatic mechanism for actuating said folders and carrying the blank from one to the other.

In testimony whereof I have affixed my signature, in presence of two witnesses.

b. J. CONRAD LUTTROPP.

Witnesses:

F. W. POWER, A. W. HARRISON. 

